Massey135":2xjwwq87 said:
On a side note, some other breed is responsible for the mature size of some Angus cows literally doubling in size over the last 50 years. Angus cows were 800 to a thousand lbs for the first 80 years of their registry now suddenly there are 16-17-1800lb so called Angus. I don't believe all the selection pressure in the world could acct for that spread in a 50yr time period.
Actually, 50 years is a long time. Dozens of generations in which you can select the biggest. I'm thinking you could double size in ten or twenty years.
As for the Jersey, perhaps that influence was needed to achieve the funnel butt found in many angus?